Multistage variable flow velocity anaerobic reactor

Abstract

The invention relates to an anaerobic reactor and in particular relates to a multistage variable flow velocity anaerobic reactor, belonging to the technical field of wastewater anaerobic treatment equipment. The anaerobic reactor comprises a reaction tank and is characterized in that the water inlet end of a water distribution device is connected with the water outlet end of a water pump by a water inlet pipe; the water outlet end of a water trough is connected with a follow-up aerobic system by a drain pipe; the water outlet end of an up-flow anaerobic sludge blanket is connected with the water inlet end of the water pump by a secondary return pipe; the water inlet end of the up-flow anaerobic sludge blanket is connected with the water inlet end of the water pump by a primary return pipe. The multistage variable flow velocity anaerobic reactor has the advantages that the multistage variable flow velocity anaerobic reactor can ensure that the up-flow velocity of a sludge-water reaction region is controlled flexibly, sludge and water are mixed fully and uniformly and sludge does not generate sediment, thus improving the reaction effects; the multistage variable flow velocity anaerobic reactor can ensure that the up-flow velocity of a sludge-water separation region is extremely low, thus furthest intercepting anaerobic sludge; the multistage variable flow velocity anaerobic reactor dispenses with a matched sedimentation tank, has small floor area and is low in investment cost.

Description

technical field [0001] The invention relates to an anaerobic reactor, in particular to a multistage variable flow rate anaerobic reactor, which belongs to the technical field of wastewater anaerobic treatment equipment. Background technique [0002] At present, organic wastewater with poor biochemical properties generally requires anaerobic treatment. Such as figure 1 As shown, in the existing anaerobic treatment of organic wastewater, the raw wastewater is generally pumped into the reaction tank 3A through the water inlet pump 1A, and the water is evenly distributed through the water distribution device 2A, and then the anaerobic treatment is carried out through the upflow anaerobic sludge bed reactor 4A. Oxygen treatment, the degraded wastewater realizes gas-liquid-solid three-phase separation in the three-phase separator 5A, and then enters the drainage tank 6A to be collected and then discharged into the sedimentation tank 11A, and the precipitated anaerobic sludge is p...

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Problems solved by technology

Inside the upflow anaerobic sludge bed reactor 4A, the rising flow rate is not greater than 1m / h. When the biochemical properties of the wastewater are not good and the gas production is not large, the anaerobic sludge inside the upflow anaerobic sludge bed reactor 4A is easy to Deposition at the bottom is not conducive to the full mixing of mud and water to contact and degrade the organic components in wastewater. At the same time, anaerobic sludge is easy to lose. It is necessary to set up a settling tank 7A, and it cannot make full use of the alkalinity after anaerobic treatment to adjust the pH of the original wastewater and reduce the alkalinity. consumption

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